General

  • Target

    1ecbb8f27e755a070dce5a1ddec70fab926c65686de7c265ba5da0206dc6c644

  • Size

    711KB

  • Sample

    240628-x2y42ssfmr

  • MD5

    0d25a84a5a6bcfa440c9997fb271c858

  • SHA1

    b85b18049f00c4a0738ecf6c968f0e36a51e4c1d

  • SHA256

    1ecbb8f27e755a070dce5a1ddec70fab926c65686de7c265ba5da0206dc6c644

  • SHA512

    632e2afbd0d3a824095de69d2d66536424206489f862f4e812f0cf513cd5c7b8bed6cc5c49d7a6b4d7e07a6e249df6c5afbe113b3b064ea0acc17b1f967f6a55

  • SSDEEP

    12288:7GckrzRNTXPhW41AcdUwUfHLidRgMEMyDM8hzXwkLjEZbzR1:7Gci7XPhW7wyH2LtIzY

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot7132889766:AAFJvPkiK-1rv-CJQ2hQXEL_CYzO_zi018g/

Targets

    • Target

      1ecbb8f27e755a070dce5a1ddec70fab926c65686de7c265ba5da0206dc6c644

    • Size

      711KB

    • MD5

      0d25a84a5a6bcfa440c9997fb271c858

    • SHA1

      b85b18049f00c4a0738ecf6c968f0e36a51e4c1d

    • SHA256

      1ecbb8f27e755a070dce5a1ddec70fab926c65686de7c265ba5da0206dc6c644

    • SHA512

      632e2afbd0d3a824095de69d2d66536424206489f862f4e812f0cf513cd5c7b8bed6cc5c49d7a6b4d7e07a6e249df6c5afbe113b3b064ea0acc17b1f967f6a55

    • SSDEEP

      12288:7GckrzRNTXPhW41AcdUwUfHLidRgMEMyDM8hzXwkLjEZbzR1:7Gci7XPhW7wyH2LtIzY

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Detect packed .NET executables. Mostly AgentTeslaV4.

    • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

    • Detects executables packed with SmartAssembly

    • Detects executables referencing Windows vault credential objects. Observed in infostealers

    • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

    • Detects executables referencing many email and collaboration clients. Observed in information stealers

    • Detects executables referencing many file transfer clients. Observed in information stealers

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

3
T1552.001

Credentials in Registry

1
T1552.002

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

4
T1005

Tasks